diff --git a/apps/server/src/process/externalLauncher.test.ts b/apps/server/src/process/externalLauncher.test.ts
index f714a70f783d..17c1c34b44d8 100644
--- a/apps/server/src/process/externalLauncher.test.ts
+++ b/apps/server/src/process/externalLauncher.test.ts
@@ -989,6 +989,12 @@ for (const { platform, installPath, editor, args } of [
     editor: "zed",
     args: ["/workspace with spaces/file.ts:12:4"],
   },
+  {
+    platform: "linux",
+    installPath: ".local/bin/px0",
+    editor: "px0",
+    args: ["/workspace with spaces/file.ts:12:4"],
+  },
 ] as const) {
   it.effect.skipIf(windowsHost && platform !== "win32")(
     `discovers and launches ${editor} outside PATH on ${platform}`,
@@ -1028,6 +1034,46 @@ for (const { platform, installPath, editor, args } of [
   );
 }
 
+// px0 has no app bundle or Windows installer location: it relies on the PATH
+// that server startup hydrates from the login shell (macOS) or the known CLI
+// dirs such as %USERPROFILE%\.local\bin (Windows).
+for (const { platform, binary } of [
+  { platform: "darwin", binary: "px0" },
+  { platform: "win32", binary: "px0.exe" },
+] as const) {
+  it.effect.skipIf(windowsHost && platform !== "win32")(
+    `discovers and launches px0 from PATH on ${platform}`,
+    () =>
+      Effect.gen(function* () {
+        const fs = yield* FileSystem.FileSystem;
+        const path = yield* Path.Path;
+        const binDir = yield* fs.makeTempDirectoryScoped({ prefix: "t3-px0-" });
+        yield* fs.writeFileString(path.join(binDir, binary), "#!/bin/sh\n");
+        yield* fs.chmod(path.join(binDir, binary), 0o755);
+        let spawned: ChildProcess.StandardCommand | undefined;
+        yield* Effect.gen(function* () {
+          const launcher = yield* ExternalLauncher.ExternalLauncher;
+          assert.include(yield* launcher.resolveAvailableEditors(), "px0");
+          yield* launcher.launchEditor({ editor: "px0", cwd: "/workspace/file.ts:12:4" });
+        }).pipe(
+          Effect.provide(
+            testLayer({
+              platform,
+              env: { PATH: binDir, PATHEXT: ".COM;.EXE;.BAT;.CMD" },
+              onSpawn: (command) => {
+                spawned = command;
+              },
+            }),
+          ),
+        );
+        assert.ok(spawned);
+        assert.equal(spawned.command, "px0");
+        assert.deepEqual(spawned.args, ["/workspace/file.ts:12:4"]);
+        assert.equal(spawned.options.shell, false);
+      }).pipe(Effect.scoped, Effect.provide(NodeServices.layer)),
+  );
+}
+
 it.effect.skipIf(windowsHost)("ignores unusable app bundles and keeps PATH launchers first", () =>
   Effect.gen(function* () {
     const fs = yield* FileSystem.FileSystem;
diff --git a/apps/web/src/components/Icons.tsx b/apps/web/src/components/Icons.tsx
index e4d41d53c3a8..2445e78ad3ac 100644
--- a/apps/web/src/components/Icons.tsx
+++ b/apps/web/src/components/Icons.tsx
@@ -709,6 +709,14 @@ export const AntigravityIcon: Icon = (props) => (
   </svg>
 );
 
+export const Px0Icon: Icon = (props) => (
+  <svg {...props} viewBox="0 0 24 24" fill="none">
+    <rect width="24" height="24" rx="5" fill="#0B0D12" />
+    <path d="M6 5h3v2H8v10h1v2H6zM18 5h-3v2h1v10h-1v2h3z" fill="#F2C14E" />
+    <rect x="10.5" y="7.75" width="3" height="8.5" rx="1.5" stroke="#F2C14E" strokeWidth="1.5" />
+  </svg>
+);
+
 export const OpenCodeIcon: Icon = (props) => (
   <svg {...props} viewBox="0 0 32 40" fill="none" xmlns="http://www.w3.org/2000/svg">
     <g clipPath="url(#opencode__clip0_1311_94969)">
diff --git a/apps/web/src/components/chat/OpenInPicker.tsx b/apps/web/src/components/chat/OpenInPicker.tsx
index 3c0b2cd118ed..17fcdb81e6e3 100644
--- a/apps/web/src/components/chat/OpenInPicker.tsx
+++ b/apps/web/src/components/chat/OpenInPicker.tsx
@@ -36,6 +36,7 @@ import {
   FinderIcon,
   Icon,
   KiroIcon,
+  Px0Icon,
   TraeIcon,
   VisualStudioCode,
   VisualStudioCodeInsiders,
@@ -112,6 +113,11 @@ export const resolveOpenInOptions = (
       value: "antigravity",
       kind: "brand",
     },
+    {
+      Icon: Px0Icon,
+      value: "px0",
+      kind: "brand",
+    },
     {
       Icon: IntelliJIdeaIcon,
       value: "idea",
diff --git a/packages/contracts/src/editor.ts b/packages/contracts/src/editor.ts
index 88028b796991..058c563bf15c 100644
--- a/packages/contracts/src/editor.ts
+++ b/packages/contracts/src/editor.ts
@@ -60,6 +60,9 @@ export const EDITORS = [
     remoteScheme: "zed",
   },
   { id: "antigravity", label: "Antigravity", commands: ["agy"], launchStyle: "goto" },
+  // px0 serves its UI from a local server and opens it in the browser; each
+  // launch starts its own server on the next free port. It takes `path:line`.
+  { id: "px0", label: "px0", commands: ["px0"], launchStyle: "direct-path" },
   { id: "idea", label: "IntelliJ IDEA", commands: ["idea"], launchStyle: "line-column" },
   { id: "aqua", label: "Aqua", commands: ["aqua"], launchStyle: "line-column" },
   { id: "clion", label: "CLion", commands: ["clion"], launchStyle: "line-column" },